What is the mass in gram of 4.65×10^22 molecules of P4O10. How many phosphorus atoms are present

Answer 1

Here are steps you can take to answer the question:

(1) Start by finding the number of moles. Divide the number of molecules by Avogadro's number. That will give the number of moles.

(2) Multiply the number of moles by the molecular weight in grams per mole of P₄O₁₀. That gives the mass in grams. To get the molecular weight, look up the atomic weights of P and O, then evaluate 4(P)+10(O).

(3) To get the number of P atoms, multiply the number of molecules by 4.